Results 31 to 40 of about 322,153 (182)
Some applications of the Shapiro time delay [PDF]
Serbian Astronomical Journal, 2023 Listening to echoes has long been a way to estimate distances, a technique whose backbone is the time delay. The gravitational field also creates a time delay, called Shapiro time delay, that helps us extract some information from the field and ...
Ghasemi Azar A., Rezaei H., Moradpour H.
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Journal of High Energy Physics, 2023 Abstract We consider four-dimensional general relativity with vanishing cosmological constant defined on a manifold with a boundary. In Lorentzian signature, the timelike boundary is of the form σ × ℝ, with σ a spatial two-manifold that we take to be either flat or S2. In Euclidean signature we take the boundary to be S2 × S1.
Dionysios Anninos +2 more
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Prospects for comparison of matter and antimatter gravitation with ALPHA-g
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2018 The ALPHA experiment has recently entered an expansion phase of its experimental programme, driven in part by the expected benefits of conducting experiments in the framework of the new AD + ELENA antiproton facility at CERN.
W. Bertsche, W. Bertsche
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Physical Review D, 2019 Particles in a yet unexplored dark sector with sufficiently large mass and small gauge coupling may form purely gravitational atoms (quantum gravitational bound states) with a rich phenomenology. In particular, we investigate the possibility of having an observable signal of gravitational waves or ultra high energy cosmic rays from the decay of ...
Nielsen, Niklas G. +2 more
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Effect of Some Modified Models of Gravity on the Radial Velocity of Binary Systems
Universe, 2022 For many classes of astronomical and astrophysical binary systems, long observational records of their radial velocity V, which is their directly observable quantity, are available.
Lorenzo Iorio, Matteo Luca Ruggiero
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Statistical Mechanics-Based Schrödinger Treatment of Gravity
Entropy, 2019 The entropic gravity conception proposes that what has been traditionally interpreted as unobserved dark matter might be merely the product of quantum effects.
Angelo Plastino, M. C. Rocca
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Gravitation from entanglement in holographic CFTs [PDF]
, 2013 A bstractEntanglement entropy obeys a ‘first law’, an exact quantum generalization of the ordinary first law of thermodynamics. In any CFT with a semiclassical holographic dual, this first law has an interpretation in the dual gravitational theory as a ...
T. Faulkner +4 more
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Bound Orbits and Epicyclic Motions around Renormalization Group Improved Schwarzschild Black Holes
Universe, 2022 We study timelike particles’ bound orbits around renormalization group improved Schwarzschild black holes (RGISBHs), which originate from renormalization group improvement of the Einstein–Hilbert action by using the running Newton constant.
Hou-Yu Lin, Xue-Mei Deng
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Performance and Flow Field of a Gravitation Vortex Type Water Turbine
, 2017 A gravitation vortex type water turbine, which mainly comprises a runner and a tank, generates electricity by introducing a flow of water into the tank and using the gravitation vortex generated when the water drains from the bottom of the tank.
Y. Nishi, T. Inagaki
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Editorial for the Special Issue 100 Years of Chronogeometrodynamics: The Status of the Einstein's Theory of Gravitation in Its Centennial Year [PDF]
, 2015 The present Editorial introduces the Special Issue dedicated by the journal Universe to the General Theory of Relativity, the beautiful theory of gravitation of Einstein, a century after its birth.
L. Iorio
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